Stainless Steel 309 Tubing consists of iron with 22-24% chromium, 12-15% nickel, 0.08% carbon, and trace amounts of manganese, silicon, phosphorus, and sulfur, providing excellent corrosion and heat resistance. Its mechanical properties include a tensile strength of 620 MPa, yield strength of 310 MPa, and elongation of 40%, ensuring durability under high-stress conditions. The physical properties feature a density of 7.9 g/cm³, a melting point of 1350-1400°C, and thermal conductivity of 15.6 W/m·K. These properties make 309 tubing ideal for high-temperature applications in power plants, refineries, and industrial heating systems.
| Specifications | ASTM A/ASME SA213 / A249 / A269 |
| Dimensions | ASTM, ASME and API |
| SS 309 Tubes Size | 10.29 OD (mm) – 762 OD (mm) |
| Thickness | 0.35 OD (mm) to 6.35 OD (mm) in thickness ranging from 0.1mm to 1.2mm. |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, “U” Shape, Hydraulic Tubes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
| Grade | 309 | |
|---|---|---|
| min | max | |
| C | – | 0.20 |
| Mn | – | 2 |
| Si | – | 1 |
| P | – | 0.045 |
| S | – | 0.030 |
| Cr | 18.0 | 23.0 |
| Mo | – | – |
| Ni | 8.0 | 14.0 |
| N | – | – |
| Grade | 309 | |
|---|---|---|
| Tensile Strength (MPa) min | 620 | |
| Yield Strength 0.2% Proof (MPa) min | 310 | |
| Elongation (% in 50mm) min | 45 | |
| Hardness | Rockwell B (HR B) max | 85 |
| Brinell (HB) max | 169 | |
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Stainless Steel 309 Tubing is widely used in high-temperature and corrosive environments due to its excellent heat resistance and durability. It is commonly found in heat exchangers, boilers, furnaces, and exhaust systems, making it ideal for industries such as power generation, petrochemicals, and thermal processing. This tubing is also used in burner assemblies, annealing covers, and catalytic converters. Its superior oxidation resistance allows it to perform well in chemical plants, incinerators, and food processing industries. The high strength and thermal stability of 309 tubing ensure reliable performance in extreme operating conditions.
Excellent corrosion resistance and is available in sizes ranging from 1/8″ to 12″ nominal diameter. It is ideal for high-temperature applications, with superior strength and durability. This tubing type ensures leak-free connections due to its seamless construction.
Good corrosion resistance and is available in sizes from 1/8″ to 24″ nominal diameter. It is produced by welding rolled strips of 309 stainless steel, making it cost-effective for various industrial applications. The welded joints are robust, ensuring long-term reliability.
High-temperature environments and comes in sizes from 1/4″ to 12″ outer diameter. Its excellent corrosion resistance makes it suitable for chemical processing and power generation industries. This tubing ensures efficient heat transfer and durability in demanding conditions.
Superior corrosion resistance and precision. It is ideal for use in high-pressure and high-temperature instrumentation systems. The smooth internal surface ensures accurate and reliable fluid flow.
Exceptional corrosion resistance and are available in sizes from 1/4″ to 5″ outer diameter. They are designed to withstand high temperatures and pressures in boiler systems. These tubes offer longevity and efficiency in steam generation and other heat-related processes.
Excellent corrosion resistance and are shaped for efficient heat exchange in compact spaces. They are widely used in heat exchangers, condensers, and economizers. Their U-shape design ensures optimal thermal performance.
High corrosion resistance and is available in sizes from 1/4″ to 2″ outer diameter. It is used in condensers for efficient heat transfer in various industrial processes. This tubing type ensures durability and performance in corrosive environments.
Excellent corrosion resistance and enhanced heat transfer efficiency. The finned design increases the surface area, making them ideal for heat exchangers and cooling systems. These tubes provide reliable performance in high-temperature applications.
Stainless Steel 309 Tubing comes with test certificates such as Mill Test Certificates (MTC) as per EN 10204 3.1/3.2, third-party inspection reports, and material traceability documents, ensuring quality assurance. Packaging is done securely using wooden crates, pallets, and bubble wraps to prevent transit damage. Delivery is efficient and timely, catering to both domestic and international markets with proper labeling, handling, and secure transportation to ensure safe arrival at the destination.
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